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tc5165buf.c revision 1.17 
      1 /*	$NetBSD: tc5165buf.c,v 1.17 2012/10/27 17:17:53 chs Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999-2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Device driver for TOSHIBA TC5165BFTS, PHILIPS 74ALVC16241/245
     34  * buffer chip
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: tc5165buf.c,v 1.17 2012/10/27 17:17:53 chs Exp $");
     39 
     40 #include "opt_use_poll.h"
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/callout.h>
     45 #include <sys/device.h>
     46 
     47 #include <machine/bus.h>
     48 #include <machine/intr.h>
     49 
     50 #include <dev/hpc/hpckbdvar.h>
     51 
     52 #include <hpcmips/tx/tx39var.h>
     53 #include <hpcmips/tx/txcsbusvar.h>
     54 #include <hpcmips/dev/tc5165bufvar.h>
     55 
     56 #define TC5165_ROW_MAX		16
     57 #define TC5165_COLUMN_MAX	8
     58 
     59 #ifdef TC5165DEBUG
     60 #define	DPRINTF(arg) printf arg
     61 #else
     62 #define	DPRINTF(arg)
     63 #endif
     64 
     65 struct tc5165buf_chip {
     66 	bus_space_tag_t		scc_cst;
     67 	bus_space_handle_t	scc_csh;
     68 	u_int16_t		scc_buf[TC5165_COLUMN_MAX];
     69 	int			scc_enabled;
     70 	int			scc_queued;
     71 	struct callout		scc_soft_ch;
     72 	struct hpckbd_ic_if	scc_if;
     73 	struct hpckbd_if	*scc_hpckbd;
     74 };
     75 
     76 struct tc5165buf_softc {
     77 	struct tc5165buf_chip	*sc_chip;
     78 	tx_chipset_tag_t	sc_tc;
     79 	void			*sc_ih;
     80 };
     81 
     82 int	tc5165buf_match(device_t, cfdata_t, void *);
     83 void	tc5165buf_attach(device_t, device_t, void *);
     84 int	tc5165buf_intr(void *);
     85 int	tc5165buf_poll(void *);
     86 void	tc5165buf_soft(void *);
     87 void	tc5165buf_ifsetup(struct tc5165buf_chip *);
     88 
     89 int	tc5165buf_input_establish(void *, struct hpckbd_if *);
     90 
     91 struct tc5165buf_chip tc5165buf_chip;
     92 
     93 CFATTACH_DECL_NEW(tc5165buf, sizeof(struct tc5165buf_softc),
     94     tc5165buf_match, tc5165buf_attach, NULL, NULL);
     95 
     96 int
     97 tc5165buf_match(device_t parent, cfdata_t cf, void *aux)
     98 {
     99 
    100 	return (1);
    101 }
    102 
    103 void
    104 tc5165buf_attach(device_t parent, device_t self, void *aux)
    105 {
    106 	struct cs_attach_args *ca = aux;
    107 	struct tc5165buf_softc *sc = device_private(self);
    108 	struct hpckbd_attach_args haa;
    109 
    110 	printf(": ");
    111 	sc->sc_tc = ca->ca_tc;
    112 	sc->sc_chip = &tc5165buf_chip;
    113 
    114 	callout_init(&sc->sc_chip->scc_soft_ch, 0);
    115 
    116 	sc->sc_chip->scc_cst = ca->ca_csio.cstag;
    117 
    118 	if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
    119 	    ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
    120 		printf("can't map i/o space\n");
    121 		return;
    122 	}
    123 
    124 	sc->sc_chip->scc_enabled = 0;
    125 
    126 	if (ca->ca_irq1 != -1) {
    127 		sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1,
    128 		    IST_EDGE, IPL_TTY,
    129 		    tc5165buf_intr, sc);
    130 		printf("interrupt mode");
    131 	} else {
    132 		sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY,
    133 		    tc5165buf_intr, sc);
    134 		printf("polling mode");
    135 	}
    136 
    137 	if (!sc->sc_ih) {
    138 		printf(" can't establish interrupt\n");
    139 		return;
    140 	}
    141 
    142 	printf("\n");
    143 
    144 	/* setup upper interface */
    145 	tc5165buf_ifsetup(sc->sc_chip);
    146 
    147 	haa.haa_ic = &sc->sc_chip->scc_if;
    148 
    149 	config_found(self, &haa, hpckbd_print);
    150 }
    151 
    152 void
    153 tc5165buf_ifsetup(struct tc5165buf_chip *scc)
    154 {
    155 
    156 	scc->scc_if.hii_ctx		= scc;
    157 	scc->scc_if.hii_establish	= tc5165buf_input_establish;
    158 	scc->scc_if.hii_poll		= tc5165buf_poll;
    159 }
    160 
    161 int
    162 tc5165buf_cnattach(paddr_t addr)
    163 {
    164 	struct tc5165buf_chip *scc = &tc5165buf_chip;
    165 
    166 	scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
    167 
    168 	tc5165buf_ifsetup(scc);
    169 
    170 	hpckbd_cnattach(&scc->scc_if);
    171 
    172 	return (0);
    173 }
    174 
    175 int
    176 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif)
    177 {
    178 	struct tc5165buf_chip *scc = ic;
    179 
    180 	/* save hpckbd interface */
    181 	scc->scc_hpckbd = kbdif;
    182 
    183 	scc->scc_enabled = 1;
    184 
    185 	return (0);
    186 }
    187 
    188 int
    189 tc5165buf_intr(void *arg)
    190 {
    191 	struct tc5165buf_softc *sc = arg;
    192 	struct tc5165buf_chip *scc = sc->sc_chip;
    193 
    194 	if (!scc->scc_enabled || scc->scc_queued)
    195 		return (0);
    196 
    197 	scc->scc_queued = 1;
    198 	callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc);
    199 
    200 	return (0);
    201 }
    202 
    203 int
    204 tc5165buf_poll(void *arg)
    205 {
    206 	struct tc5165buf_chip *scc = arg;
    207 
    208 	if (!scc->scc_enabled)
    209 		return (POLL_CONT);
    210 
    211 	tc5165buf_soft(arg);
    212 
    213 	return (POLL_CONT);
    214 }
    215 
    216 void
    217 tc5165buf_soft(void *arg)
    218 {
    219 	struct tc5165buf_chip *scc = arg;
    220 	bus_space_tag_t t = scc->scc_cst;
    221 	bus_space_handle_t h = scc->scc_csh;
    222 	u_int16_t mask, rpat, edge;
    223 	int i, j, type, val;
    224 	int s;
    225 
    226 	hpckbd_input_hook(scc->scc_hpckbd);
    227 
    228 	/* clear scanlines */
    229 	(void)bus_space_read_2(t, h, 0);
    230 	delay(3);
    231 
    232 	for (i = 0; i < TC5165_COLUMN_MAX; i++) {
    233 		rpat = bus_space_read_2(t, h, 2 << i);
    234 		delay(3);
    235 		(void)bus_space_read_2(t, h, 0);
    236 		delay(3);
    237 		if ((edge = (rpat ^ scc->scc_buf[i]))) {
    238 			scc->scc_buf[i] = rpat;
    239 			for (j = 0, mask = 1; j < TC5165_ROW_MAX;
    240 			    j++, mask <<= 1) {
    241 				if (mask & edge) {
    242 					type = mask & rpat ? 1 : 0;
    243 					val = j * TC5165_COLUMN_MAX + i;
    244 					DPRINTF(("%d %d\n", j, i));
    245 					hpckbd_input(scc->scc_hpckbd,
    246 					    type, val);
    247 				}
    248 			}
    249 		}
    250 	}
    251 
    252 	s = spltty();
    253 	scc->scc_queued = 0;
    254 	splx(s);
    255 }
    256